Oracle Password Expired

Run the following command

> sqlplus system/admin@localhost/xe

SQL*Plus: Release 11.2.0.2.0 Production on Thu Nov 20 16:36:23 2014

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

ERROR:
ORA-28001: the password has expired

Changing password for system
New password:
Retype new password:

or development you can disable password policy if no other profile was set (i.e. disable password expiration in default one):

ALTER PROFILE "DEFAULT" LIMIT PASSWORD_VERIFY_FUNCTION NULL;